Catalyst carrier for biomass pyrolysis, catalyst and preparation method of catalyst carrier

A catalyst carrier and biomass pyrolysis technology, which is applied in the direction of catalyst carrier, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problems of long-term cycle use, catalyst wear resistance, high temperature stability, water resistance, There is no specific description of the specific surface area, etc., to achieve the effect of improving the anti-coking ability and catalytic cracking tar ability, long catalyst life, and stable performance

Pending Publication Date: 2021-07-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned catalysts are mainly used for in-situ catalysis and need to be mixed with biomass. However, there is no specific description of the catalyst’s wear resistance, high temperature stability, water resistance, and specific surface area, and it is difficult to achieve the effect of long-term recycling.

Method used

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  • Catalyst carrier for biomass pyrolysis, catalyst and preparation method of catalyst carrier
  • Catalyst carrier for biomass pyrolysis, catalyst and preparation method of catalyst carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Dissolve sucrose, turnip powder, polyvinyl alcohol (average molecular weight: 22,000) and nickel nitrate in deionized water containing 25wt% ethanol, adjust the pH to 3 with oxalic acid, and slowly add tetraethyl orthosilicate while stirring at 60°C. The solution is slowly turned into a gel, and dried at 120°C to form a moldable green body. Wherein, based on the quality of tetraethyl orthosilicate, the content of sucrose powder is 5wt%, the content of polyvinyl alcohol is 1wt%, the content of nickel nitrate is 0.3wt%, and the mass ratio of sucrose to tetraethyl orthosilicate is 1:1 . The above green body was prepared into about 1.0mm microspheres, and dried at 120°C.

[0057] The dried microspheres were sent into a microwave roasting furnace, kept at a constant temperature of 1600 °C for 15 hours in an argon atmosphere, soaked in 40 wt% hydrofluoric acid solution for 12 hours, placed in deionized water for 5 min, and then treated with Wash with deionized water and rep...

Embodiment 2

[0060] Dissolve sucrose, turnip powder, polyvinyl alcohol (average molecular weight: 22,000) and nickel nitrate in deionized water containing 25wt% ethanol, adjust the pH to 3 with oxalic acid, and slowly add tetraethyl orthosilicate while stirring at 60°C. The solution is slowly turned into a gel, and dried at 120°C to form a moldable green body. Wherein, based on the quality of tetraethyl orthosilicate, the content of sucrose powder is 5wt%, the content of polyvinyl alcohol is 1wt%, the content of nickel nitrate is 0.3wt%, and the mass ratio of sucrose to tetraethyl orthosilicate is 1:1 . The above green body was prepared into about 1.0mm microspheres, and dried at 120°C.

[0061] The dried microspheres were sent into a microwave roasting furnace, kept at a constant temperature of 1600 °C for 15 hours in an argon atmosphere, soaked in 40 wt% hydrofluoric acid solution for 12 hours, placed in deionized water for 5 min, and then treated with Wash with deionized water and rep...

Embodiment 3

[0064] Dissolve glycerin, hydroxypropylmethylcellulose, polyvinyl alcohol (average molecular weight: 22000), and nickel nitrate in deionized water containing 10 wt% ethanol, adjust the pH to 5 with citric acid, and slowly add normal Ethyl silicate, so that the solution slowly turns into a gel, and dried at 120°C to form a moldable green body. Among them, based on the quality of tetraethyl orthosilicate, the content of hydroxypropyl methylcellulose is 0.5wt%, the content of polyvinyl alcohol is 0.2wt%, the content of nickel nitrate is 0.3wt%, and the content of glycerin and tetraethyl orthosilicate The mass ratio is 10:1. The above green body was prepared into about 1.0 mm microspheres, and dried at 120°C.

[0065] Put the dried microspheres into a microwave roasting furnace, keep the temperature at 1500°C in an argon atmosphere for 24 hours, soak them in 40wt% hydrofluoric acid solution for 12 hours, place them in deionized water for 5 minutes, and then use Wash with deioniz...

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Abstract

The invention discloses a preparation method of a catalyst carrier for biomass pyrolysis, and the preparation method comprises the following steps: firstly preparing a green body, then carrying out molding, drying and roasting treatment on the obtained green body, adding the green body into a hydrofluoric acid solution for soaking treatment, and conducting washing to obtain a silicon carbide carrier; performing high-temperature treatment on the silicon carbide carrier in the presence of oxygen-containing gas; and finally, conducting mixing with an alkaline solution or a hydrofluoric acid solution for treatment, and then conducting washing, drying and roasting to obtain the carrier. The invention also provides a biomass pyrolysis catalyst adopting the carrier. The biomass pyrolysis catalyst has the advantages of high strength and wear resistance, can be applied to a fixed bed, a moving bed or a fluidized bed, especially has stable performance in a high-temperature environment of a biomass pyrolysis reaction, and has relatively high catalyst activity and relatively long catalyst life.

Description

technical field [0001] The invention belongs to the technical field of biomass energy processing, and in particular relates to a catalytic material for preparing oil and gas products through catalytic pyrolysis of biomass and realizing tar conversion and a preparation method thereof. Background technique [0002] Bio-tar has complex components, high adhesion, high pollution, and difficult to use, which can easily lead to pipeline blockage and equipment damage, and may also cause serious environmental pollution problems. The water washing method conventionally used for biomass gas purification increases process complexity, equipment investment and energy consumption, and the ensuing wastewater problem runs counter to the environmental protection concept of green production. Compared with it, catalytic cracking method has more advantages. [0003] The catalytic cracking method is to add a catalyst in the biomass gasification process or in the gasification subsequent reactor, a...

Claims

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Application Information

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IPC IPC(8): B01J27/224B01J27/24B01J32/00B01J35/10B01J37/02B01J37/08B01J37/34C10G70/00
CPCB01J27/224B01J27/24B01J37/0207B01J37/08B01J37/346C10G70/00B01J35/615B01J35/633B01J35/635Y02E50/10
Inventor 张彪宋永一蔡海乐王鑫赵丽萍吴斯侃王博刘继华张长安
Owner CHINA PETROLEUM & CHEM CORP
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